I feel for you smeeeee, my son has been a heroin addict for the past 20 years and he has also said that I did terrible things to him. I even started to wonder if it was true, I felt utterly destroyed. However I know I did not do them the same as you did not hurt your daughter. She is being manipulative which is something drug addicts are very adept at doing. Is there not a drug agency which deals with addicts and families in your area where you could talk to someone for some support. You also need to try and talk to your son to make him see that your daughter is sick and to ask himself does he seriously believe that the mother who he loves and wants to help would have been cruel to his sibling. I am so sorry you are having a tough time, I know how it feels. I am now on anti anxiety medication and find I can cope much better. Perhaps a trip to the GP and also try and find a way of building a life for yourself in the new area. Contact your local Age Uk and see what they have in your area. It may be a way for you to meet new people and give you something else to focus on. Good luck